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Questions in biology

[Terjawab] Hydrogen gas (H₂) and oxygen gas (O₂) react to form liquid hydrogen peroxide (H₂O₂). Which statement is true about the reaction? A. The same atoms are present, so the chemical properties are the same. B. The atoms of the reactants have combined to form a new substance. C. The product that is formed has the same physical properties as the reactants. D. The two gases have mixed together, but a new substance has not formed.

[Terjawab] All organisms, even plants, perform cellular respiration because __________. Select one: A. All organisms need to eat protein B. All organisms need to dispose of NADH C. All organisms need ATP for cell work D. All organisms need oxygen

[Terjawab] Cloning is a process by which: A. Undesirable genes may be eliminated B. An organism that is genetically identical to another is made C. Many identical protein fragments are produced D. A virus and a bacterium may be fused into one

[Terjawab] How do skin cells form different types of tissues? A. Information in the DNA of the nucleus can tell skin cells how to develop and perform special functions, which causes a group of these cells to perform similar functions and become skin. B. Information in the RNA of the nucleus can tell skin tissues how to develop and perform special functions, which causes a group of these cells to perform similar functions and become skin.

[Terjawab] Gymnosperms have small male cones because ______. Select one: A. larger cones would dry out more easily B. pollen is very small and does not require a large cone C. small cones do not block sun as much as larger cones D. larger cones are too heavy

[Terjawab] Oxygen is released as a waste product by plants during the process of photosynthesis.

[Terjawab] Which of the following best illustrates the role that gravity played in the formation of our solar system? A. Gravity allowed the nebula to expand and move outward. B. Gravity caused the nebula to cool enough for planets to form. C. Gravity removed excess gas and dust from the cores of the planets. D. Gravity pulled particles of dust and gas together to form planets.

[Terjawab] An example of xylem tissue is: A. openings in leaves B. long fibres in celery C. cells that cover the surface of leaves D. small projections extending from roots

[Terjawab] If bryophytes developed vascular tissue, they would be able to: Select one: A. fertilize their eggs without the need for a thin film of water B. better compete for light C. return to an aquatic environment D. withstand higher temperatures

[Terjawab] Unlike animal cell mitosis, during mitosis in a plant cell, __________________. Select one: A. Cell wall formation occurs along the same line that chromosomes lined up for metaphase. B. A parent cell divides twice to create four haploid gametes. C. The number of chromosomes doubles between parent and daughter cells. D. Chromosomes do not condense.